Admin panel "Catalog" -> "Stocks" problem with displaying products in multistore mode

[roman.nikolaevich]

PrestaShop v.1.7.8.9, Server software version: Apache/2, PHP version: 7.4.33

 Multistore - a problem with displaying the table with products in the "Catalog" -> "Stocks" tab:
The essence of the problem: when "All shops" is enabled, I get the error "You can't manage your stock in this store context: select a store instead of a group of stores."
When I choose one of the stores, I get an error:
"The page is down. The host *** cannot process this request at this time. HTTP ERROR 500"
When I turn off the multistore mode, everything works as it should.

Edited March 6 by roman.nikolaevich
add server/php version (see edit history)